Insulator for automatically securing conducting-wires.



' F. ZACHHUBER. INSULATOR FOB AUTOMATICALLY SECURING CONDUCTING WIRES.

, APPLICATION FILED DOT. 26, 1911. 1,045,353.

Patented Nov. 26, 19-12, 1

\Nitnesses: I Inventor:

, Arro'm'e I dent of Nuremberg,

FRANZ ZACHHUBER, 0F NUREMBERG, GERMANY.

I INSULATOR FOR AUTOMATICALLY SECURING CONDUCTING-WIRES.

Specification of Letters Patent.

Application filed October 2 6, 1911. Serial No. 656,840.

To all whom it may concern:

j Be it known that I, FRANZ ZAOHHUBER, a subject of the German Emperor, and resi- Germany, have invented certain new and useful Improvements in Insulators for ductingJVires, of which'thefollowing is-a specification.

The invention relates to that class of in sulators forconducting wires in which the wire is automatically secured in its stretched condition by means of a clamping body which is movable in a hollow of the insulator head. Insulators of this class, in which the wire is secured by means of balls which are moving in a groove of the insulator head, are known, but they are practically improper. In effect the balls are pressing at one side on the wire and at the other side on the upper edges ot the groove which. are partly extending, and which consequently are the Weakest parts of the insulator head, so that said edges are rapidly broken off by the interior clamping pressure.

The present invention has for its object to avoid this drawback. This object is attained through the combination of an insulator provided with a groove, on one wall of which groove is disposed a hollow which is gradually enlarging toward one end of the groove and which contains a laterally acting clamping roller and of a forked support of a well known construction, to the inwardly extending prongs of which the clamping pressure is transmitted in a vertical direction.

In the accompanying drawing: Figure 1 is a view of the insulator with the top partly I cut away. Fig. 2 1s a top view of the same.

Fig. 3 is a side view.

l designates the body of the insulator made of the usual materials. The insulator is supported by a fork 2, the prongs of which are extending into the top or head of the insulator. Said head is provided with a vertical groove. One wall 3 of said groove is provided with a channel in which partly extends the conducting Wire 4. The other wall 5 of the groove is provided with a hollow 6 which is gradually enlarging toward one end of the groove. Within said Automatically Securing Conloosely located a clamping roller 7 in such a manner that its rolling surface is applied against the wall of the hollow and partly extends into the groove outside the hollowfl6. The conducting wire 4 is engaged between said clamping roller 7 and the groove wall 3.

hen fitting up,

hollow is the wire is engaged into the groove. of the insulator head and located between the clamping roller 7 and the groove. wall '3. The insulator is to be mounted in such hollow 6, in whichthe roller is moving, is enlarging in the direction in which the wire is being stretched; The clamping roller 7, which isforced back into the enlarging hollow 6, cannot make any resistance against the wire being stretched. To secure the wire in its stretched condition, it is only necessary to engage it against the clamping roller and to let it go gently back for auton'atically securing the wire by the'clamping roller which is forced to move with the wire and acts as a wedge when rolling over the inclined bottom oft-he hollow 6. Consequently the clamping pressure is transmitted vertically to the prongs of the forked support, so that a bursting of the insulator head under the influence of the clamping pressure will certainly be avoided. The forked supports allow of dispensing with the wire catching means which are used now for receivingwires getting loose, since it an insulator gets bursted, for instance by a stones throw, the wire is received between the prongs of the forked support. Of course the clamping roller could be substituted by any other device having the same effect and the shape of the groove and of the body of the insulator might also be modified.

Having now fully described my said invention,'what I claim and desire to secure by Letters Patent, is:

A conducting Wire insulator for automatically securing the wires, comprising-a body of insulating material, a groove in the upper part of said body, a channel having 'Patented Nov.26,"1912. I

a manner that the roller a rounded section provided in the lower part of one of the groove walls for receiving a part of the Wire section, a clamping roller moving into a hollow which is gradually narrowed in 'the direetion ofrthe pull-en- I head under Copies of this patent inay beohtained for 1 ceiving the Wire between its prongs it the erted by the stretched wire so as to autoinsulator gets bursted. matically secure said stretched wire by the t In testimony whereof I haveherernto set wedging action of theroller, a forked supmy hand in presence of two witnesses.

port, the prongs of which are extending into FRANZ ZACHHUBER. the insulator head on both sides of the groove, for avoiding the bursting of said:

the wedging straina'ndfor re- Witnesses Oso'AR Boon, v Bnxn Prrrronrmm.

. v V five cents each, by addressing the Commissioner of Patents. Washington. D. G. 2 

